Morphometric measurements for sexual dimorphism in the Campolina horse breed

Authors

  • Lisia Castro Krebs Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.
  • Marina Monteiro de Moraes Santos Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.
  • Maria Claudia Siqueira Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.
  • Brennda Paula Gonçalves de Araujo Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.
  • Leonardo Gomes Oliveira Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.
  • Fabiany Sousa Costa Feitosa Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.
  • Gregório Miguel Ferreira de Camargo Universidade Federal da Bahia, Escola de Medicina Veterinária e Zootecnia, Avenida Adhemar de Barros, no 500, Ondina, CEP 40170-110 Salvador, BA.
  • Chiara Albano de Araújo Oliveira Universidade Federal da Bahia, Escola de Medicina Veterinária e Zootecnia, Avenida Adhemar de Barros, no 500, Ondina, CEP 40170-110 Salvador, BA.
  • Raphael Bermal Costa Universidade Federal da Bahia, Escola de Medicina Veterinária e Zootecnia, Avenida Adhemar de Barros, no 500, Ondina, CEP 40170-110 Salvador, BA.
  • Erica Beatriz Schultz Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.
  • Fernanda Nascimento de Godoi Universidade Federal Rural do Rio de Janeiro, Instituto de Zootecnia, BR 465, Km 07, CEP 23897-000 Seropédica, RJ.

DOI:

https://doi.org/10.1590/S1678-3921.pab2021.v56.27055

Keywords:

Equus caballus, equine morphology, multivariate analysis

Abstract

The objective of this work was to distinguish the sexual dimorphism of horses of the Campolina breed, by morphometric measurements, and to classify them according to sex, using discriminating functions. Two-hundred and fifteen horses were measured, and 39 morphometric measurements were evaluated. The analysis of covariance and the discriminant analysis were performed. Males were taller and showed a wider chest, a greater scapular-humeral angle, and a larger neck, both in length and circumference. Females had a larger heart girth, wider hips, and a greater opening of the coxal-ground and femorotibial angles. Regarding classification, circumference measurements (85.58%) were more accurate in sexual differentiation than the linear (83.26%) and angular (73.02%) ones. As to classification error, of the total animals measured, 10 to 20% of the females were categorized as males. In addition, 11 to 38% of the males were categorized as females. It can be concluded that of the 39 morphometric measurements evaluated, 22 are responsible for sexual dimorphism in the Campolina horse breed. Circumference and linear measurements provide a more assertive classification to determine sexual dimorphism. Angular measurements show greater classification errors regarding the gender of the horses.

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Published

2022-05-13

How to Cite

Krebs, L. C., Santos, M. M. de M., Siqueira, M. C., Araujo, B. P. G. de, Oliveira, L. G., Feitosa, F. S. C., … Godoi, F. N. de. (2022). Morphometric measurements for sexual dimorphism in the Campolina horse breed. Pesquisa Agropecuaria Brasileira, 56(Y), e02148. https://doi.org/10.1590/S1678-3921.pab2021.v56.27055

Issue

V.56, Jan./Dec., 2021 :Continuos publication

Section

ANIMAL SCIENCE